1-Methylimidazolium Hydrogen Sulfate: An Efficient Catalyst for the Synthesis of Substituted Pyrroles
Wu Changchun, Zang Hongjun, Li Daqing, Yu Nianqin, Cheng Bowen, Yu Kai
Chin. J. Org. Chem. . 2013, (11): 2417 -2422 .  DOI: 10.6023/cjoc201305012